Question

2sin^2 x + cos^2 x = 25/16. Find sin x.

Answer 1

Try expressing sin in terms of cos or vice versa

Answer 2

use the identity cos^2 x = 1 - sin^2 x

Answer 3

okay

Answer 4

@cwrw238 3/4! :)

Answer 5

Thank you @cwrw238 :)

Answer 6

sin^2 x = 25/16 - 1 = 9/16

sin x = 3/4 or -3/4

Answer 7

yw